CN219388714U - Automatic pressure relief safety valve - Google Patents

Abstract

The utility model provides an automatic pressure relief safety valve, and belongs to the technical field of machinery. The automatic pressure relief valve solves the problem that an existing automatic pressure relief valve is inconvenient to use. This automatic relief safety valve, including the valve body that has inlet end and play water end, the upper end of valve body has linked firmly long tubular upper cover, link firmly the guide cylinder of tube-shape in the valve body, coaxial case seat that is equipped with the tube-shape in the guide cylinder, wear to be equipped with the valve rod in the valve body, the valve rod sets up with the guide cylinder is coaxial, the lower extreme of valve rod has linked firmly the case, the upper end threaded connection of upper cover has the regulating seat, the valve rod passes the regulating seat, the outside cover of valve rod is equipped with down the push pedal, the lower extreme of push pedal supports and leans on the valve rod, the outside cover of valve rod is equipped with the spring, the both ends of spring are supported respectively and are leaned on the lower extreme of regulating seat and the upper end of push pedal down, the spring promotes the valve rod and makes the shutoff of case advance water end, the upper cover is equipped with the handle and the handle can drive the valve rod and move up. This automatic relief valve has the advantage that can adjust relief pressure and can manual pressure release.

Description

Automatic pressure relief safety valve

Technical Field

The utility model belongs to the technical field of machinery, and relates to a safety valve, in particular to an automatic pressure relief safety valve.

Background

The safety valve is a special valve which is in a normally closed state under the action of external force and prevents the medium pressure in the pipeline or the equipment from exceeding a specified value by discharging the medium to the outside of the system when the medium pressure in the equipment or the pipeline rises to exceed the specified value. The opening and closing parts of the traditional safety valve are closed through the elastic force of the spring, when the pressure is too high, the pressure pushes the opening and closing parts and extrudes the spring, so that the opening and closing parts are opened, when the pressure is recovered to be normal, the opening and closing parts are reset and closed again under the elastic force of the spring, therefore, only the spring for sensing the pressure is known, the spring is different in size, the elastic force of the spring is different, the spring with different elastic force can react differently when facing the same pressure, when the elastic force is extremely high, even if the internal pressure of the safety valve is extremely high, the opening and closing parts are difficult to push to open, so that the pressure cannot be released in time, and accidents are extremely easy to occur.

The plug-in pressure relief safety valve (application number: 202010614177.6) comprises a valve body, a sealing joint, a first sealing ring and a second sealing ring; the sealing joint seals the top end opening of the valve body; along the axial direction of the valve body, the side wall of the valve body is sequentially provided with a first annular mounting groove, an auxiliary port and a second annular mounting groove; the first sealing ring and the second sealing ring are respectively arranged in the first annular mounting groove and the second annular mounting groove; when the plug-in type pressure relief safety valve is plugged into the system to be plugged, the first sealing ring and the second sealing ring are respectively sealed with the system to be plugged, and the auxiliary port is in conductive connection with an external discharge flow passage of the system to be plugged; when the pressure in the system to be plugged is higher than the opening pressure of the plug-in type pressure relief safety valve, the main port and the auxiliary port at the bottom end of the valve body are communicated. However, the automatic pressure relief safety valve is not provided with a manual pressure relief function and the set pressure relief pressure is inconvenient to adjust, so that the automatic pressure relief safety valve is inconvenient to use.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides an automatic pressure relief safety valve capable of adjusting pressure relief pressure and relieving pressure manually.

The aim of the utility model can be achieved by the following technical scheme: the automatic pressure relief safety valve comprises a valve body with a water inlet end and a water outlet end, wherein the upper end of the valve body is fixedly connected with a long cylindrical upper cover, the automatic pressure relief safety valve is characterized in that a cylindrical guide cylinder is fixedly connected in the valve body, a cylindrical valve core seat is coaxially arranged in the guide cylinder, a valve rod is arranged in the valve body in a penetrating manner, the valve rod and the guide cylinder are coaxially arranged, the lower end of the valve rod is fixedly connected with a valve core, the upper end of the upper cover is in threaded connection with an adjusting seat, the valve rod penetrates through the adjusting seat, a lower pushing plate is sleeved on the outer side of the valve rod, the lower end of the lower pushing plate abuts against the valve rod, a spring is sleeved on the outer side of the valve rod, two ends of the spring abut against the lower end of the adjusting seat and the upper end of the lower pushing plate respectively, and the valve rod pushes the valve core to seal the water inlet end, the upper cover is provided with a handle, and the handle can drive the valve rod to move upwards.

When the valve rod is in operation, under the action of spring force, the valve rod is pushed to enable the valve core to plug the water inlet end, when the pressure of the water inlet end is overlarge, the pressure of the water inlet end overcomes the elasticity of the spring to push the valve core to move upwards, so that water at the water inlet end flows towards the water outlet end to complete pressure relief, and when the pressure after pressure relief is smaller than the elasticity of the spring, the spring pushes the valve rod to enable the valve core to plug the water inlet end. When manual pressure relief is needed, the valve core moves upwards when the handle pushes the valve rod to overcome the elastic force of the spring, and the manual pressure relief function is completed. The compression amount of the regulating spring is realized by rotating the regulating seat, so that the aim of regulating the pressure relief pressure is fulfilled, and the regulating device has the advantages of convenience in regulation and simple and reliable structure.

In the automatic pressure relief safety valve, the upper end of the valve rod is in threaded connection with the lock nut, the upper cover is provided with the push rod, one end of the push rod is hinged to the upper cover, the push rod is located at the lower side of the lock nut, the middle of the push rod can be abutted against the lower end face of the lock nut, the inner end of the handle is hinged to the upper cover, and the handle is located at the lower side of the push rod, and the upper end of the handle can be abutted against the other end of the push rod. Through upwards pulling the handle, the other end of handle promotion push rod upwards swings, thereby drives the valve rod through push rod promotion lock mother and upwards moves to accomplish the pressure release, have manual pressure release easy operation laborsaving advantage.

In the automatic pressure relief safety valve, the upper end of the handle is provided with a convex column which is propped against the other end of the push rod. The convex column on the handle is propped against the other end of the push rod, so that a longer force arm is formed between the handle and the push rod, and the handle has the advantages of convenient operation and labor saving.

In the automatic pressure relief safety valve, the middle part of the push rod is provided with a convex bulge part which can be abutted against the lower end surface of the lock nut. The protruding part is propped against the lock nut, so that the push rod can well push the lock nut and drive the valve rod to move upwards, and the lock nut has the advantage of being reliable in use.

In the automatic pressure relief safety valve, the middle part of the valve rod is sleeved with the upper push plate, the upper push plate abuts against the lower end face of the adjusting seat, the middle part of the valve rod is provided with the shoulder, the lower push plate abuts against the shoulder, and two ends of the spring abut against the upper push plate and the lower push plate respectively. Through setting up foretell push pedal and push pedal down, the spring of being convenient for conveys elasticity to on adjusting seat and the valve rod, has the reliable advantage of transmission.

In the automatic pressure relief safety valve, the lower end of the regulating seat is provided with an outer conical surface I, the upper end surface of the upper push plate is provided with an inner conical surface I, and the outer conical surface I is embedded in the inner conical surface I. By setting the abutting of the first inner conical surface and the first outer conical surface, the push plate has a good positioning effect.

In the automatic pressure relief safety valve, a shoulder is arranged in the middle of the valve rod, the upper end face of the shoulder is a second outer conical surface, the lower end of the lower push plate is provided with a second inner conical surface, and the second outer conical surface is abutted against the second inner conical surface.

In the automatic pressure relief safety valve, the upper end of the guide cylinder is provided with an annular boss, and the annular boss is extruded between the valve body and the upper cover. The annular boss is extruded between the valve body and the upper cover, so that the guide cylinder has a good positioning effect, and the guide cylinder is prevented from shaking.

In the automatic pressure relief safety valve, a fixed ring is fixedly connected in the valve body, and the lower end of the guide cylinder penetrates through the fixed ring. By adopting the arrangement, the lower end of the guide cylinder has a good positioning effect.

In the automatic pressure relief safety valve, the outer side wall of the valve core seat is annularly provided with a plurality of annular grooves, sealing rings are arranged in the annular grooves, and the outer sides of the sealing rings are extruded to the guide cylinder. By adopting the arrangement, the guide cylinder and the valve core seat form a good sealing effect.

Compared with the prior art, the automatic pressure relief safety valve has the following advantages:

1. when manual pressure relief is needed, the valve core moves upwards when the handle pushes the valve rod to overcome the elastic force of the spring, so that the manual pressure relief function is completed;

2. the compression amount of the regulating spring is regulated by rotating the regulating seat, so that the aim of regulating the pressure relief pressure is fulfilled, and the regulating seat has the advantages of convenience in regulation and simplicity and reliability in structure;

3. the handle is pulled upwards, the other end of the push rod is pushed to swing upwards by the handle, and the lock nut is pushed by the push rod so as to drive the valve rod to move upwards, so that pressure relief is completed, and the pressure relief device has the advantages of simplicity and labor saving in manual pressure relief operation;

4. the convex column on the handle is abutted against the other end of the push rod, so that a longer force arm is formed between the handle and the push rod, and the device has the advantages of convenience in operation and labor saving;

5. the lower end of the guide cylinder penetrates through the fixing ring, and has a good positioning effect on the lower end of the guide cylinder.

Drawings

Fig. 1 is a schematic perspective view of the automatic pressure relief valve.

Fig. 2 is a schematic cross-sectional view of the present automatic pressure relief valve.

In the figure, 1, a valve body; 1a, a water inlet end; 1b, a water outlet end; 2. an upper cover; 3. a guide cylinder; 3a, an annular boss; 4. a valve core seat; 4a, an annular groove; 5. a valve stem; 5a, a shoulder; 5b, an external conical surface II; 6. a valve core; 7. an adjusting seat; 7a, an external conical surface I; 8. a lower push plate; 8a, an inner conical surface II; 9. a spring; 10. a handle; 10a, convex columns; 11. locking a nut; 12. a push rod; 12a, a boss; 13. a push plate; 13a, an inner conical surface I; 14. and a fixing ring.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

The automatic pressure relief safety valve comprises a valve body 1 with a water inlet end 1a and a water outlet end 1b, wherein a long cylindrical upper cover 2 is fixedly connected to the upper end of the valve body 1, and is characterized in that a cylindrical guide cylinder 3 is fixedly connected in the valve body 1, a cylindrical valve core seat 4 is coaxially arranged in the guide cylinder 3, a valve rod 5 penetrates through the valve body 1, the valve rod 5 and the guide cylinder 3 are coaxially arranged, a valve core 6 is fixedly connected to the lower end of the valve rod 5, an adjusting seat 7 is connected to the upper end of the upper cover 2 in a threaded manner, the valve rod 5 penetrates through the adjusting seat 7, a lower push plate 8 is sleeved on the outer side of the valve rod 5, the lower end of the lower push plate 8 abuts against the valve rod 5, a spring 9 is sleeved on the outer side of the valve rod 5, two ends of the spring 9 abut against the lower end of the adjusting seat 7 and the upper end of the lower push plate 8 respectively, the spring 9 pushes the valve rod 5 to enable the valve core 6 to block the water inlet end 1a, and the upper cover 2 is provided with a handle 10 and the handle 10 can drive the valve rod 5 to move upwards.

The upper end threaded connection of valve rod 5 has lock female 11, is equipped with push rod 12 on upper cover 2, and the one end of push rod 12 articulates on upper cover 2, and push rod 12 is located the downside of lock female 11 and the middle part of push rod 12 can support the lower terminal surface that leans on lock female 11, and the inner of handle 10 articulates on upper cover 2, and handle 10 is located the downside of push rod 12 and the upper end of handle 10 can support the other end that leans on push rod 12.

The upper end of the handle 10 is provided with a convex column 10a, the column 10a is abutted against the other end of the push rod 12, and a longer force arm is formed between the handle 10 and the push rod 12 through the column 10a, so that the handle has the advantages of convenience in operation and labor saving. The middle part of push rod 12 has protruding bellying 12a and bellying 12a can support and lean on the lower terminal surface of lock nut 11, makes push rod 12 can be better promote lock nut 11 and drive valve rod 5 and reciprocate, has the advantage of reliable in use.

The middle part cover of valve rod 5 is equipped with push pedal 13, and push pedal 13 supports and leans on the lower terminal surface of adjusting seat 7, and the middle part of valve rod 5 is equipped with convex shoulder 5a, and push pedal 8 supports and leans on convex shoulder 5a down, and on push pedal 13 and push pedal 8 down were supported respectively at the both ends of spring 9, on the spring 9 will elasticity transmission was adjusted seat 7 and valve rod 5 of being convenient for, had the reliable advantage of transmission.

The lower end of the adjusting seat 7 is provided with an outer conical surface I7 a, the upper end surface of the upper push plate 13 is provided with an inner conical surface I13 a, and the outer conical surface I7 a is embedded in the inner conical surface I13 a, so that the upper push plate 13 has a good positioning effect. The upper end surface of the shoulder 5a is a second outer conical surface 5b, the lower end of the lower push plate 8 is provided with a second inner conical surface 8a, and the second outer conical surface 5b abuts against the second inner conical surface 8 a.

The upper end of the guide cylinder 3 is provided with an annular boss 3a, the annular boss 3a is extruded between the valve body 1 and the upper cover 2, the guide cylinder 3 is provided with a good positioning effect, and the guide cylinder 3 is prevented from shaking. The valve body 1 is fixedly connected with a fixed ring 14, and the lower end of the guide cylinder 3 passes through the fixed ring 14, so that the lower end of the guide cylinder 3 has a good positioning effect.

The outer side wall of the valve core seat 4 is annularly provided with three annular grooves 4a, sealing rings are arranged in the annular grooves 4a, and the outer sides of the sealing rings are extruded on the guide cylinder 3, so that the guide cylinder 3 and the valve core seat 4 form a good sealing effect.

When the valve is in operation, under the action of the elastic force of the spring 9, the valve rod 5 is pushed to enable the valve core 6 to plug the water inlet end 1a, when the pressure of the water inlet end 1a is overlarge, the pressure of the water inlet end 1a overcomes the elastic force of the spring 9 to push the valve core 6 to move upwards, so that water at the water inlet end 1a flows to the water outlet end 1b to complete pressure relief, and when the pressure after pressure relief is smaller than the elastic force of the spring 9, the spring 9 pushes the valve rod 5 to enable the valve core 6 to plug the water inlet end 1a. When manual pressure relief is needed, the handle 10 is pulled upwards, the convex column 10a on the handle 10 is propped against the other end of the push rod 12 and pushes the other end of the push rod 12 to swing upwards, and the lock nut 11 is pushed by the push rod 12 so as to drive the valve rod 5 to move upwards, so that pressure relief is completed, and the pressure relief device has the advantages of simplicity and labor saving in manual pressure relief operation. The compression amount of the adjusting spring 9 is realized by rotating the adjusting seat 7, so that the aim of adjusting the pressure relief pressure is fulfilled, and the device has the advantages of convenience in adjustment and simple and reliable structure.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although terms of the valve body 1, the water inlet end 1a, the water outlet end 1b, the upper cover 2, the guide cylinder 3, the annular boss 3a, the valve core seat 4, the annular groove 4a, the valve stem 5, the shoulder 5a, the second outer tapered surface 5b, the valve core 6, the adjusting seat 7, the first outer tapered surface 7a, the lower push plate 8, the second inner tapered surface 8a, the spring 9, the handle 10, the boss 10a, the lock nut 11, the push rod 12, the boss 12a, the upper push plate 13, the first inner tapered surface 13a, the retainer ring 14, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims (10)

1. The automatic pressure relief safety valve comprises a valve body (1) with a water inlet end (1 a) and a water outlet end (1 b), wherein the upper end of the valve body (1) is fixedly connected with a long cylindrical upper cover (2), the automatic pressure relief safety valve is characterized in that a cylindrical guide cylinder (3) is fixedly connected in the valve body (1), a cylindrical valve core seat (4) is coaxially arranged in the guide cylinder (3), a valve rod (5) is penetrated in the valve body (1), the valve rod (5) and the guide cylinder (3) are coaxially arranged, the lower end of the valve rod (5) is fixedly connected with a valve core (6), the upper end of the upper cover (2) is in threaded connection with an adjusting seat (7), the valve rod (5) penetrates through the adjusting seat (7), the outer side of the valve rod (5) is sleeved with a lower push plate (8), the lower end of the lower push plate (8) is abutted against the valve rod (5), the outer side of the valve rod (5) is sleeved with a spring (9), the lower end of the spring (9) is abutted against the lower end of the valve rod (6) of the valve rod (1), the upper cover (2) is provided with a handle (10), and the handle (10) can drive the valve rod (5) to move upwards.

2. The automatic pressure relief safety valve according to claim 1, wherein the upper end of the valve rod (5) is in threaded connection with a lock nut (11), the upper cover (2) is provided with a push rod (12), one end of the push rod (12) is hinged to the upper cover (2), the push rod (12) is located at the lower side of the lock nut (11) and the middle part of the push rod (12) can be abutted against the lower end face of the lock nut (11), the inner end of the handle (10) is hinged to the upper cover (2), the handle (10) is located at the lower side of the push rod (12) and the upper end of the handle (10) can be abutted against the other end of the push rod (12).

3. The automatic pressure relief safety valve according to claim 2, wherein the upper end of the handle (10) has a protruding boss (10 a) and the boss (10 a) abuts against the other end of the push rod (12).

4. The automatic pressure relief safety valve according to claim 2, wherein the middle part of the push rod (12) is provided with a convex bulge (12 a) and the bulge (12 a) can be abutted against the lower end surface of the lock nut (11).

5. The automatic pressure relief safety valve according to claim 1, 2, 3 or 4, wherein the middle part of the valve rod (5) is sleeved with an upper push plate (13), the upper push plate (13) is abutted against the lower end face of the adjusting seat (7), a shoulder (5 a) is arranged in the middle part of the valve rod (5), the lower push plate (8) is abutted against the shoulder (5 a), and two ends of the spring (9) are abutted against the upper push plate (13) and the lower push plate (8) respectively.

6. The automatic pressure relief safety valve according to claim 5, wherein the lower end of the adjusting seat (7) is provided with an outer conical surface one (7 a), the upper end surface of the upper push plate (13) is provided with an inner conical surface one (13 a), and the outer conical surface one (7 a) is embedded in the inner conical surface one (13 a).

7. The automatic pressure relief safety valve according to claim 5, wherein the upper end surface of the shoulder (5 a) is a second outer conical surface (5 b), the lower end of the lower push plate (8) is provided with a second inner conical surface (8 a), and the second outer conical surface (5 b) is abutted against the second inner conical surface (8 a).

8. The automatic pressure relief safety valve according to claim 1 or 2 or 3 or 4, wherein the upper end of the guide cylinder (3) is provided with an annular boss (3 a), and the annular boss (3 a) is extruded between the valve body (1) and the upper cover (2).

9. The automatic pressure relief safety valve according to claim 1, 2, 3 or 4, wherein a fixed ring (14) is fixedly connected in the valve body (1), and the lower end of the guide cylinder (3) passes through the fixed ring (14).

10. The automatic pressure relief safety valve according to claim 1, 2, 3 or 4, wherein the outer side wall of the valve core seat (4) is provided with a plurality of annular grooves (4 a), sealing rings are arranged in the annular grooves (4 a), and the outer sides of the sealing rings are extruded on the guide cylinder (3).